The Australian tennis star went down 7-6, 7-6, 6-3 in straight sets to opponent Andrey Rublev at the Arthur Ashe stadium in New York.
Aside from the odd complaint about the floodlights impairing his vision and calling a line judge a “whistleblower” there were unusually no major outbursts from Kyrgios.
But he made a number of remarks after being questioned on his tweet suggesting the ATP was “pretty corrupt” for which he could yet face suspension.
“I guess I’ve been on the road five and a half months now. It’s not easy,” Kyrgios said.
“Would I welcome it [the suspension]? I don’t know if I look at it like that,” he smirked.
“I don’t know. I have no say in it. I guess it’s out of my control.
“I haven’t [spoken to anyone], to be honest. I mean, no, I haven’t heard anything about it.”
After being asked what the ATP Tour should do, Kyrgios replied: “I don’t know, man, what do you think they should do? Deep down you might have an answer.
“Yeah, I guess I’m a pretty boring player, I don’t bring much to the sport, so…”.
Kyrgios could be banned for his latest outburst, despite the 24-year-old later deleting the tweet.
He is set to head to the Laver Cup in Geneva on September 20, but those plans could now be curtailed.
It is the latest in a long line of controversies surrounding the player – with several coming this summer.
He was fined $113,000 (£93,254) for five separate acts of unsportsmanlike conduct during his defeat at the Cincinnati Masters , leading Andy Murray to condemn his behaviour.
Included in the rap sheet was leaving the court without permission to smash two racquets and calling Irish umpire Fergus Murphy a “f***ing tool”.
Murray said: “I chatted to him a little bit after the match – it wasn’t good, and I felt for Fergus as he shouldn’t have to put up with that.
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“It’s obviously up to him, and I think for the most part a couple of weeks ago in Washington, he did a good job of helping himself and using the crowd.
“But obviously this week, he went back to what he was doing before. You just hope he will figure it out, because a week like in Washington (where Kyrgios won the title) is really good for tennis, but last night isn’t. Hopefully he gets it figured out.”
Meanwhile 21-year-old Rublev goes on to face Matteo Berretini in the next round.
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